# JHP byNSDev vs Resistor calc

The clearest difference is price: JHP byNSDev at Free against Resistor calc's $1.99. Resistor calc's advantage is update cadence (every 2 months vs every 7 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

JHP byNSDev is free to download; Resistor calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

JHP byNSDev ships an update every 7 months, Resistor calc every 2 months. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | JHP byNSDev | Resistor calc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 26 MB | 17 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [Anas Abubakar](https://appshunter.io/developer/1581534101) |

## What reviewers say

### JHP byNSDev

[App page](https://appshunter.io/ios/app/jhp-bynsdev/id1244732477)

**Features:** macOS Compatibility

**In-app purchases:** none


### Resistor calc

[App page](https://appshunter.io/ios/app/resistor-calc-electronics/id6477826973)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JHP byNSDev free?

JHP byNSDev is free to download, with no in-app purchases.

### Is Resistor calc free?

Resistor calc costs $1.99, with no in-app purchases.

### Do JHP byNSDev or Resistor calc have ads?

Neither JHP byNSDev nor Resistor calc shows ads.

### Which is updated more often, JHP byNSDev or Resistor calc?

JHP byNSDev ships an update every 7 months, and Resistor calc every 2 months. Most recently, JHP byNSDev was updated on September 16, 2026 and Resistor calc on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*